Table 3.

ECG Variables Related to All‐Cause Mortality

Variables	Age‐, Sex‐ and Cohort‐ Adjusted		Multivariable Adjusteda		ECG×Cohort	ECG×Sex
	HR (95% CI)	P Value	HR (95% CI)	P Value	Interaction P	Interaction P
PR interval	1.03 (0.97, 1.09)	0.35	1.07 (1.01, 1.13)	0.03	0.79	0.48
QRS duration	1.09 (1.04, 1.15)	0.001	1.09 (1.03, 1.15)	0.003	0.49	0.67
QT interval	1.04 (0.97, 1.10)	0.26	1.25 (1.15, 1.36)	<0.0001	0.53	0.44
QTcFram	1.15 (1.09, 1.22)	<0.0001	1.15 (1.08, 1.22)	<0.0001	0.98	0.01
QTcBaz	1.20 (1.13, 1.27)	<0.0001	1.18 (1.11, 1.25)	<0.0001	0.56	0.004
QRS voltage	1.15 (1.08, 1.23)	<0.0001	1.12 (1.05, 1.20)	0.0009	0.045	0.28
LVH	1.93 (1.49, 2.50)	<0.0001	1.73 (1.33, 2.24)	<0.0001	0.02	0.14
Left atrial enlargement	1.58 (1.26, 1.99)	<0.0001	1.41 (1.12, 1.77)	0.004	0.06	0.91
LBBB	1.41 (0.87, 2.28)	0.16	1.35 (0.83, 2.18)	0.2	0.68	0.91
RBBB	1.29 (0.99, 1.68)	0.06	1.21 (0.93, 1.58)	0.2	0.64	0.90

Hazard ratio is per SD change in continuous variables, and from comparison of the presence of dichotomous variables to their absence. CI indicates confidence interval; ECG, electrocardiogram; HR, hazard ratio; LBBB, left bundle branch block; LVH, left ventricular hypertrophy; RBBB, right bundle branch block.

^aAdjusted for body mass index, heart rate (except QTc), systolic blood pressure, antihypertensive therapy, diabetes, and smoking.